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EP1519995A1 - Coating material with biocide microcapsules - Google Patents

Coating material with biocide microcapsules

Info

Publication number
EP1519995A1
EP1519995A1 EP02762295A EP02762295A EP1519995A1 EP 1519995 A1 EP1519995 A1 EP 1519995A1 EP 02762295 A EP02762295 A EP 02762295A EP 02762295 A EP02762295 A EP 02762295A EP 1519995 A1 EP1519995 A1 EP 1519995A1
Authority
EP
European Patent Office
Prior art keywords
coating composition
composition according
bound
biocide
plaster
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02762295A
Other languages
German (de)
French (fr)
Other versions
EP1519995B1 (en
Inventor
Rüdiger Baum
Dagmar Antoni-Zimmermann
Thomas Wunder
Hans-Jürgen Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thor GmbH
Original Assignee
Thor GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Thor GmbH filed Critical Thor GmbH
Priority to EP06012608.3A priority Critical patent/EP1698672B1/en
Publication of EP1519995A1 publication Critical patent/EP1519995A1/en
Application granted granted Critical
Publication of EP1519995B1 publication Critical patent/EP1519995B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/16—Antifouling paints; Underwater paints
    • C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
    • A01N25/28—Microcapsules or nanocapsules
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10—Coating or impregnating
    • C04B20/1018—Coating or impregnating with organic materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00112—Mixtures characterised by specific pH values
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/2092—Resistance against biological degradation

Definitions

  • the invention relates to a coating composition for protection against microorganism attack on surfaces which are exposed to the effects of moisture or water, the coating composition either itself having a pH value of at least 11.0 or intended for coating a substrate material, the pH value thereof is at least 11.0.
  • the invention relates to plasters and paints which are to be protected against attack by microorganisms with biocides.
  • plasters and paints for the preservation of their films 5 are mixed with fungicidal and / or algicidal biocides. This is to prevent undesirable infestation of the films by microorganisms, for example fungi, such as mold and yeast, and by bacteria, algae and cyanobacteria (see D. Antoni-Zimmermann, P. Hahn, "Aqueous silicone resin coating systems for facades", expert publishes , Volume 522, pages 379 to 406).
  • microorganisms for example fungi, such as mold and yeast
  • bacteria, algae and cyanobacteria see D. Antoni-Zimmermann, P. Hahn, "Aqueous silicone resin coating systems for facades", expert publishes , Volume 522, pages 379 to 406).
  • Such an attack by microorganisms occurs, for example, in building facades provided with appropriate plasters and paints. These become discolored due to the growth of the microorganisms and, depending on the weather situation, therefore require a new surface treatment after
  • a building material which contains microcapsules in which hinokitiol is included as an active ingredient.
  • This active ingredient should escape from the microcapsules for a longer period of time and be distributed in the building material, in order to use it, for example, to remove microbes and bacteria.
  • Hinokitiol is not suitable as a biocide, especially to sufficiently suppress the growth of algae and fungi on building facades.
  • EP 0758633 B1 describes porous granules which are loaded with chemical substances in order to store them and to release them slowly.
  • a chemical substance is, for example, a biocide.
  • the material of the granules can e.g. be a porous ceramic material.
  • the invention is based on the object of specifying a coating material, in particular a plaster or a paint, for protection against microorganism attack on surfaces which are exposed to the effects of moisture or water.
  • a coating material in particular a plaster or a paint
  • the microorganism attack should also be prevented or delayed if an initially high pH drops over time on the surface to be protected.
  • a coating composition of the type mentioned at the outset which is characterized in that the coating composition contains a biocide which in a carrier material is bound from solid particles and is released therefrom with a delay.
  • the coating composition according to the invention has a pH of at least 11. This has the advantage that the coating composition, after being applied to the surface to be protected, initially prevents the growth of microorganisms, in particular algae and fungi, by means of its pH in the alkaline range. Another advantage is that if, over time, the action of carbon dioxide from the air as well as thaw and rainwater neutralizes the alkaline components of the coating material more and more and leaches them out of the coating material and the pH value that results from this the mass would again enable microorganism growth, the carrier material used according to the invention gradually releases the biocide contained therein and thus prevents further growth of the microorganisms.
  • the coating composition on the surface to be protected retains a perfect appearance for a longer period.
  • a silicate-bound coating material which naturally has a relatively high pH value, could not be equipped with a biocide mixed in in the normal way from the beginning, because this would decompose in the strongly alkaline environment.
  • such a coating composition would lose its biocidal action even in a relatively short time by washing out the alkaline constituents and would permit algae or fungal growth again.
  • the coating composition can also have a pH of significantly below 11.0, for example a pH of 8.5. It is then intended for application to a strongly alkaline surface, e.g. on concrete or a cement-bound reinforcement plaster of a full-heat plaster system.
  • a strongly alkaline surface e.g. on concrete or a cement-bound reinforcement plaster of a full-heat plaster system.
  • Falling alkaline compounds gradually penetrate from the substrate material into the biocide-containing coating and would normally decompose an unprotected biocide therein by increasing the pH. This would be the case, for example, if the coating were applied to the strongly alkaline substrate before its pH value had dropped to a value at which the biocide remained stable due to carbon dioxide from the air.
  • the pH should drop to about 4 to 9.
  • the biocide be used in the usual way, i.e. without adding the carrier material of solid particles used according to the invention to the coating, as is e.g. happens with known synthetic resin-bound plasters and paints, one would achieve no or an insufficient biocidal effect.
  • the reason is that the strongly alkaline components penetrating into the coating from the substrate decompose the biocide and / or bring it into a soluble form. The resulting substances are no longer biocidal and / or are quickly washed out. Since only a few biocides with high resistance in the strongly alkaline range are known and therefore the spectrum of action against microorganisms is severely limited in this range, the invention brings about a significant improvement in this regard.
  • the coating composition according to the invention is preferably a silicate-bound or mineral plaster with a pH of at least 11 or a synthetic resin-bound or silicone-resin-bound plaster with a pH of less than 11.
  • the coating composition is a silicate-bound paint with a pH of at least at least 11 or a synthetic resin-bonded or silicone resin-bonded paint with a pH of less than 11.
  • the biocide is a fungicide, an algicide or a mixture of both. It is also possible to use more than two biocides at the same time.
  • Preferred fungicides in the context of the invention are isothiazolinones, carbamates, pyrithiones, aldehydes, ketones, quinones, amines, amidines, guanidines, hydrazo and azo compounds, aromatic carboxylic acid nitriles, esters, amides and imides, benzimidazoles, quinoxalines, imidazoles, Triazoles, pyrimidines, triazines, halogenated and nitrated alcohols and phenols, perhalogenoalkyl mercaptan derivatives, phosphoric and phosphonic acid esters, tetrahydro-1, 3, 5-thiadiazinthione, thio and isothiocyanates, thiophenes, antibiotics and herbal active substances.
  • Specific examples of fungicides which are particularly suitable according to the invention are methyl-1H-benzimidazol-2-ylcarbamate
  • algicides in the context of the invention are triazines, N, N-dimethylureas and uracils.
  • algicides which are very suitable according to the invention are N 2 -t-butyl-N 4 -ethyl-6-methylthio-1,3,5-triazine-2,4-diyldiamine (terbutryn), 2-chloro-4,6-bis (isopropylamino) -s-triazine, 2-t-butylamino-4-ethylamino-6-methoxy-s-triazine, 2-methylthio-4-butylamino-6-cyclopropylamino-s-triazine, 4-butylamino-2-chloro 6-ethylamino-s-triazine, 3- (4-isopropylphenyl) -1, 1-dimethylurea, N '- (3,4-dichlorophenyl) -N, N-di
  • microcapsules contain the biocides in finely dispersed, liquid or solid phases.
  • the wall material of the microcapsules can be very different materials, namely natural, semi-synthetic and synthetic materials.
  • Natural materials preferred for the microcapsule wall in the context of the invention are gum arabic, agar, agarose, maltodextrin, sodium alginate, calcium alginate, dextran, fats, fatty acids, cetyl alcohol, milk solids, molasses, gelatin, gluten, albumin, shellac, starches, caseinates, stearins, Sucrose and waxes such as beeswax, carnau wax and spermaceti wax.
  • Preferred semisynthetic materials for the microcapsule wall are cellulose acetate, cellulose acetate butyrate, cellulose acetate phthalate, cellulose nitrate, ethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl methyl cellulose phthalate, methyl cellulose, sodium carboxymethyl cellulose, hydrogenated tallow, hydrated tallow, hydrated tallow, myrylated, tallow, Glyceryl mono- or tristearates and 12-hydroxystearyl alcohol.
  • Preferred synthetic materials for the microcapsule wall are formaldehyde-melamine resins, acrylic polymers and copolymers, such as polyacrylamide, polyalkyl cyanoacrylate, and poly (ethylene vinyl acetate), aluminum monostearate, carboxyvinyl polymers, polyamides, poly (methyl vinyl ether-maleic anhydride), Poly (adipyl-L-lysine), polycarbonates, polyterephthalamide, poly (vinyl acetate phthalate), poly (terephthaloyl-L-lysine), polyarylsulfones, poly (methyl methacrylate), poly ( ⁇ -caprolactone), polyvinyl pyrrolidone, Polydimethylsi- loxane, polyoxyethylene, polyester, polyglycolic acid, polylactic acid and their copolymers, polyglutamic acid, polylysine, polystyrene, poly- (styrene-acrylonitrile), polyimides and polyvinyl alcohol.
  • Particularly preferred wall materials of the microcapsules are formaldehyde-melamine resins.
  • the microcapsule wall can also consist of two or more of the aforementioned materials.
  • microcapsules used as carrier material Numerous methods are known for producing the microcapsules used as carrier material in the context of the invention (see, for example, C.A. Finch, R. Bodmeier, Microencapsulation, Ullmann's Encyclopedia of Industrial Chemistry, 6th edition 2001, electronic release). Depending on the desired biocide and the wall material of the microcapsules to be used, the appropriate method can be selected in each case.
  • such particles are used as granulate particles with cavities whose cavities e.g. pores created by foaming the material are, as in the case of a foamed ceramic material or in the case of expanded clay, or if the cavities are structure-related cavities, as are present in the case of zeolites.
  • cavities e.g. pores created by foaming the material are, as in the case of a foamed ceramic material or in the case of expanded clay, or if the cavities are structure-related cavities, as are present in the case of zeolites.
  • Suitable granulate particles in the form of a foamed ceramic material and various processes for their production are e.g. known from EP 0758633 Bl.
  • Other support materials, such as zeolites, are described in DE 4337844 AI.
  • the aforementioned solid particles of the carrier material for example, like as microcapsules, foamed ceramic material, zeolite, and ⁇ preferably have a size in the range of 30 to 40 microns.
  • the coating composition according to the invention can contain all substances which are generally known and customary, depending on the intended use of the composition.
  • binders and film formers such as polyacrylates, polystyrene acrylates or silicone resins
  • auxiliaries such as pigments, fillers, solvents, thickeners, defoamers, plasticizers, dispersants, emulsifiers and agents for adjusting the pH of the coating composition
  • Production examples 1 to 3 illustrate the production of microcapsules in which a biocidal active ingredient is included.
  • Production example 4 explains the production of a silicate-bound facade plaster, production example 5 that of a synthetic resin-bound rubbing plaster.
  • Examples 1 to 4 and comparative examples 1 to 4 illustrate the better stability of the plasters according to the invention against washing out of the biocide contained therein.
  • Examples 5 and 6 and comparative examples 5 to 7 illustrate the fungal growth on various plaster surfaces and the advantage achieved by the invention.
  • Production Example 1
  • microcapsules were produced in which zinc pyrithione (2-pyridine thiol-1-oxide zinc) was included as a biocidal active ingredient.
  • the water was introduced to prepare the microcapsules. Polyacrylate, gum arabic, silicone defoamer and zinc pyrithione were stirred in. The resulting mixture was adjusted to pH 3 with hydrochloric acid and then heated to a temperature of 70 ° C. The formaldehyde-melamine resin was then added dropwise over a period of 1 hour. The mixture was subsequently stirred at the same temperature for a further 2 h.
  • the mixture obtained contained the desired microcapsules and was used unchanged in the preparation of the microcapsule-containing plaster.
  • Production Example 2
  • microcapsules were produced in which DCOIT (4, 5-dichloro-2-octylisothiazolin-3-one) was included as a biocidal active ingredient.
  • the water was introduced to prepare the microcapsules. Polyacrylate, gum arabic, silicone defoamer and zinc pyrithione were stirred in. The resulting mixture was adjusted to pH 3 with hydrochloric acid and then heated to a temperature of 70 ° C. The formaldehyde-melamine resin was then added dropwise over a period of 1 hour. The mixture was subsequently stirred at the same temperature for a further 2 h.
  • the mixture obtained contained the desired microcapsules and was used unchanged in the preparation of the microcapsule-containing plaster.
  • microcapsules were produced in which IPBC (3-iodo-2-propynyl-N-butyl carbamate) was included as a biocidal active ingredient.
  • IPBC 50% aqueous dispersion
  • the water was introduced to prepare the microcapsules. Gum arabic, silicone defoamer and IPBC dispersion were mixed in. The mixture was then adjusted to a pH of 1 to 2 with the citric acid and heated to a temperature of 55 to 60 ° C. Then the formaldehyde-melamine resin was added dropwise over 1 hour. The mixture was subsequently stirred at 55 to 60 ° C for 2 h.
  • the mixture obtained contained the desired microcapsules and was used unchanged in the preparation of the microcapsule-containing plaster.
  • a silicate-bound white facade plaster with a grain size of 1.5 to 2 mm was produced.
  • a premix was first prepared, which then became a final mix, i.e. the plaster was processed.
  • Titanium dioxide (Bayertitan R-KB-5) 3.0
  • the total amount of the amounts of substance given above for the premix and the final mixture gives 100.0% by weight.
  • a synthetic resin-bonded white rubbing plaster was made from the following materials in the usual way.
  • the rubbing plaster obtained had a pH of 8.5 to 9.
  • Example 1 and Comparative Example 1 The rubbing plaster obtained had a pH of 8.5 to 9.
  • the resin-bound plaster obtained according to Production Example 5 with a pH of 8.5 was mixed with the microcapsule-containing mixture according to Production Example 1.
  • the amount of biocide in the plaster was 578 ppm.
  • Test specimens in the form of round plaster samples for the watering tests were made from the plaster treated in this way. manufactured .
  • the plaster was painted into a round plastic mold with a diameter of approx. 5 cm and a depth of 3 mm. The layer thickness corresponded to the grain size of the plaster.
  • the plaster sample was then allowed to dry and harden completely.
  • the test specimen was then removed from the mold and conditioned for the washing test.
  • round plaster samples were also produced, which differed from the above samples only in that the zinc pyrithione was mixed into the plaster, not in microencapsulated form, but in normal powder form.
  • the level of zinc pyrithione in the plaster was determined before washing and after washing for different periods.
  • the samples were statically soaked in 1 1 DIBT solution, the solution being completely renewed every 24 hours, with the exception of the 7th day.
  • the DIBT solution is an alkaline solution specified by the German Institute for Building Technology (DIBT) for watering samples.
  • DIBT German Institute for Building Technology
  • the solution has a pH of 12.5 and consists of the following substances:
  • Example 1 and comparative example 1 were repeated, but with the change that now the silicate-bound rubbing plaster according to preparation example 5 with a pH of 11.5 was used and the washing in water took place for 1, 2 and 7 days.
  • Example 1 and Comparative Example 1 were essentially repeated, but with some changes. These consisted in that instead of the microcapsules with zinc pyrithione obtained in Preparation Example 1, the microcapsules obtained in Preparation Example 2 with DCOIT as the biocidal active ingredient were used, and the samples were heated to a temperature of 54 ° C. for 4 weeks instead of washing.
  • the silicate-bound plaster according to production example 4 with a pH of 11.5 was used.
  • Example 3 and comparative example 3 were repeated, but with the change that instead of the microcapsules according to preparation example 2 with DCOIT, the microcapsules according to preparation example 3 with IPBC were now used.
  • the fungal growth on the sample surface was examined.
  • the silicate-bound plaster applied to a carrier plate according to Preparation Example 4 was either biocide-free (Comparative Example 5), or with 100 ppm zinc pyrithione (Comparative Example 6), 200 ppm zinc pyrithione (Comparative Example 7), 100 ppm microencapsulated zinc pyrithione (Example 5) or 200 ppm microencapsulated zinc pyrithione (Example 6) added.
  • the plaster samples were applied as a layer to previously watered calcium silicate plates measuring 4.5 cm ⁇ 9 cm.
  • the layer thickness of the plaster was in the order of its grain, i.e. at 1.5 to 2 mm.
  • the mushroom growth test was carried out as follows:
  • the plaster samples were poured into a common agar medium. The samples were then sprayed with a fungal spore suspension. The suspension contained equal proportions of the following test organisms:
  • the total concentration of the pilzinoculum was 10 6 spores / ml.
  • the samples were stored in the usual way over a longer period of time under optimal growth conditions for fungi. The fungal growth on the sample surface was then evaluated.
  • Example 5 100 (encapsulate> lt) 0 0 0
  • Example 6 200 (encapsulated .lt) 0 0 0

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Ceramic Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Plant Pathology (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Toxicology (AREA)
  • Dentistry (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to a coating material for protection against microorganisum invasion on surfaces which are exposed to the effects of damp or water. The coating material has either a pH-value of at least 11.0 or is provided with a base material for the coating whereby the pH-value is at least 11.0. The coating material is characterised in that it contains a biocide which bonds to solid particles in a carrier material and is released in a delayed manner therefrom.

Description

Beschichtungsmasse mit Biozidmikrokapseln Coating compound with biocide microcapsules
Beschreibungdescription
Die Erfindung betrifft eine Beschichtungsmasse zum Schutz gegen Mikroorganismenbefall von Oberflächen, die der Einwirkung von Feuchtigkeit oder Wasser ausgesetzt sind, wobei die Beschichtungsmasse entweder selbst einen pH-Wert von mindestens 11,0 aufweist oder für das Beschichten eines Untergrundmaterials vorgesehen ist, dessen pH-Wert mindestens 11,0 beträgt. Insbesondere bezieht sich die Erfindung auf Putze und Anstrichfarben, die mit Bioziden gegen einen Angriff durch Mikroorganismen geschützt werden sollen.The invention relates to a coating composition for protection against microorganism attack on surfaces which are exposed to the effects of moisture or water, the coating composition either itself having a pH value of at least 11.0 or intended for coating a substrate material, the pH value thereof is at least 11.0. In particular, the invention relates to plasters and paints which are to be protected against attack by microorganisms with biocides.
Es ist seit langem bekannt, daß Putze und Farben zur Konservierung ihrer Filme5, mit fungizid und/oder algizid wirkenden Bioziden versetzt werden. Dadurch soll ein unerwünschter Befall der Filme durch Mikroorganismen, z.B. Pilze, wie Schimmelpilze und Hefen, sowie durch Bakterien, Algen und Cyanobakterien verhindert werden (siehe D. Antoni-Zimmermann, P. Hahn, "Wässrige Siliconharz-Beschichtungssysteme für Fassaden", expert verlag, Band 522, Seiten 379 bis 406) . Ein solcher Mikroorganismenbefall tritt beispielsweise bei mit entsprechenden Putzen und Anstrichfarben versehenen Gebäudefassaden auf. Diese verfärben sich durch das Wachstum der Mikroorganismen und benötigen daher je nach Bewitterungs- situation schon nach relativ kurzer Zeit eine neue Oberflächenbehandlung .It has long been known that plasters and paints for the preservation of their films 5 are mixed with fungicidal and / or algicidal biocides. This is to prevent undesirable infestation of the films by microorganisms, for example fungi, such as mold and yeast, and by bacteria, algae and cyanobacteria (see D. Antoni-Zimmermann, P. Hahn, "Aqueous silicone resin coating systems for facades", expert publishes , Volume 522, pages 379 to 406). Such an attack by microorganisms occurs, for example, in building facades provided with appropriate plasters and paints. These become discolored due to the growth of the microorganisms and, depending on the weather situation, therefore require a new surface treatment after a relatively short time.
Das gilt einerseits für solche Mauerbeschichtungen, deren pH- Wert in einem Bereich liegt, der ein Wachstum der Mikroorganismen erlaubt. Normalerweise handelt es sich hierbei um sogenannte kunstharzgebundene Beschichtungssysteme.On the one hand, this applies to those wall coatings whose pH is in a range that allows the microorganisms to grow. Usually these are so-called synthetic resin-bound coating systems.
P:\TEXT\PATENT\ 63 5BI Andererseits gilt dies aber auch für sogenannte silicatgebun- dene Putze oder Anstrichfarben. Zwar liegt deren pH-Wert durch den großen Anteil an alkalischen Verbindungen oft in einem so hohen Bereich, daß zunächst kein Befall durch die Mikroorganismen stattfindet. Silicatbeschichtungen auf Dispersionsbasis haben bei ihrem Auftrag auf ein Mauerwerk einen pH-Wert von 11 bis 11,5. Reine Silicatbeschichtungen oder zementäre Systeme weisen häufig einen noch höheren pH-Wert auf .P: \ TEXT \ PATENT \ 63 5BI On the other hand, this also applies to so-called silicate-bound plasters or paints. Because of the large proportion of alkaline compounds, their pH value is often in such a high range that there is initially no infection by the microorganisms. Dispersion-based silicate coatings have a pH of 11 to 11.5 when applied to masonry. Pure silicate coatings or cement systems often have an even higher pH.
Diese hohen pH-Werte nehmen aber im Laufe der Zeit ab. Dies geschieht einerseits auf Grund einer Neutralisation von alkalischen Beschichtungsmassebestandteilen durch Kohlendioxid aus der Luft. Andererseits existieren aber offensichtlich noch weitere Ursachen für den Mikroorganismenbefall auch bei stark alkalischen Beschichtungen. In der letzten Zeit häufen sich mehr und mehr Fälle, in denen trotz alkalischer Beschichtung an Gebäudefassaden schon nach relativ kurzer Zeit ein Bewuchs durch beispielsweise Algen oder Pilzen auftritt. Eine mögliche Ursache hierfür könnte in der Verwendung von immer dickeren oder qualitativ besseren Wärmeisoliermaterialien sein, die an den Gebäudefassaden unter den Beschichtungen angebracht werden, was teilweise auch durch neue Wärmedämmvorschriften veranlaßt ist . Die bessere Isolierung verringert den Wärmeaustausch zwischen der Gebäudeinnenseite und der Beschichtungsaußenoberflache . Dies begünstigt die Taubildung und verzögert das Trocknen der Außenbeschichtung (siehe J.P. Blaich, "Die Gebäudehülle", Fraunhofer IRB Verlag, Seiten 46 bis 58, insbesondere Seiten 48 bis 50, Abschnitt 3, "Tauwasserniederschlag").However, these high pH values decrease over time. On the one hand, this is due to the neutralization of alkaline coating composition components by carbon dioxide from the air. On the other hand, there are obviously other causes for microorganism infestation, even with strongly alkaline coatings. In recent times, there have been more and more cases in which, despite the alkaline coating on building facades, overgrowth occurs, for example, from algae or fungi. A possible cause for this could be the use of increasingly thicker or better quality thermal insulation materials, which are attached to the building facades under the coatings, which is also partly caused by new thermal insulation regulations. The better insulation reduces the heat exchange between the inside of the building and the outside of the coating. This promotes the formation of dew and delays the drying of the outer coating (see J.P. Blaich, "The Building Shell", Fraunhofer IRB Verlag, pages 46 to 58, in particular pages 48 to 50, section 3, "condensation precipitation").
Je besser die Wärmedämmung einer Gebäudefassade ist, desto schneller und länger wird dort der Taupunkt unterschritten. Die Folge ist dann eine Begünstigung des Auswaschens von alkalischen Bestandteilen aus der Fassadenoberfläche, deren pH-Wert dadurch schneller in einen niedrigeren Bereich ab- sinkt, in dem der Putz oder die Anstrichfarbe wieder ein Mikroorganismenwachstum zuläßt. Gleichzeitig nimmt durch die längeren Feuchtigkeitszyklen auch das Ausmaß des Befalls zu.The better the thermal insulation of a building facade, the faster and longer the temperature falls below the dew point. The result is a favorable washing out of alkaline constituents from the facade surface, the pH value of which quickly drops to a lower range. decreases, in which the plaster or paint again allows microorganism growth. At the same time, the extent of the infestation increases due to the longer moisture cycles.
Aus der EP 1108824 AI ist ein Baumaterial bekannt, das Mikro- kapseln enthält, in denen Hinokitiol als Wirkstoff eingeschlossen ist. Dieser Wirkstoff soll während eines längeren Zeitraums aus den Mikrokapseln austreten und sich in dem Baumaterial verteilen, um damit beispielsweise Mikroben und, Bakterien zu beseitigen. Das Hinokitiol ist als Biozid nicht geeignet, speziell das Wachstum von Algen und Pilzen an Gebäudefassaden in ausreichendem Umfang zu unterdrücken.From EP 1108824 AI a building material is known which contains microcapsules in which hinokitiol is included as an active ingredient. This active ingredient should escape from the microcapsules for a longer period of time and be distributed in the building material, in order to use it, for example, to remove microbes and bacteria. Hinokitiol is not suitable as a biocide, especially to sufficiently suppress the growth of algae and fungi on building facades.
In der EP 0758633 Bl sind poröse Granulate beschrieben, die mit chemischen Stoffen beladen sind, um diese zu lagern und langsam freizugeben. Ein solcher chemischer Stoff ist beispielsweise ein Biozid. Das Material der Granulate kann z.B. ein poröses keramisches Material sein.EP 0758633 B1 describes porous granules which are loaded with chemical substances in order to store them and to release them slowly. Such a chemical substance is, for example, a biocide. The material of the granules can e.g. be a porous ceramic material.
In der DE 4324315 AI wird von einer Feinputzmasse berichtet, die gegebenenfalls ein Biozid als Zusatz enthalten kann. Dieses ist aber in keiner Weise gegen Zersetzung geschützt .DE 4324315 AI reports a fine plaster compound which may optionally contain a biocide as an additive. However, this is in no way protected against decomposition.
Der Erfindung liegt die Aufgabe zugrunde, eine Beschichtungsmasse, insbesondere einen Putz oder eine Anstrichsfarbe, zum Schutz gegen Mikroorganismenbefall von Oberflächen, die der Einwirkung von Feuchtigkeit oder Wasser ausgesetzt sind, anzugeben. Hierbei soll der Mikroorganismenbefall auch dann verhindert oder verzögert werden, wenn an der zu schützenden Oberfläche ein zunächst hoher pH- ert im Laufe der Zeit absinkt .The invention is based on the object of specifying a coating material, in particular a plaster or a paint, for protection against microorganism attack on surfaces which are exposed to the effects of moisture or water. In this case, the microorganism attack should also be prevented or delayed if an initially high pH drops over time on the surface to be protected.
Diese Aufgabe löst die Erfindung durch eine Beschichtungsmasse der eingangs genannten Art, die dadurch gekennzeichnet ist, daß die Beschichtungsmasse ein Biozid enthält, das in einem Trägermaterial aus Feststoffteilchen gebunden ist und daraus verzögert freigegeben wird.This object is achieved by the invention from a coating composition of the type mentioned at the outset, which is characterized in that the coating composition contains a biocide which in a carrier material is bound from solid particles and is released therefrom with a delay.
Gemäß einer ersten Ausführungsform weist die erfindungsgemäße Beschichtungsmasse einen pH-Wert von mindestens 11 auf. Dies hat den Vorteil, daß die Beschichtungsmasse nach dem Aufbringen auf die zu schützende Oberfläche zunächst durch ihren pH-Wert im alkalischen Bereich das Wachstum von Mikroorganismen, insbesondere von Algen und Pilzen, unterbindet. Ein weiterer Vorteil liegt darin, daß dann, wenn im Laufe der Zeit durch die Einwirkung von Kohlendioxid aus der Luft sowie durch Tau- und Regenwasser die alkalischen Bestandteile der Beschichtungsmasse mehr und mehr neutralisiert und aus der Beschichtungsmasse ausgewaschen werden und der dadurch gesunkene pH-Wert der Masse wieder ein Mikroorganismenwachstum ermöglichen würde, das erfindungsgemäß eingesetzte Trägermaterial das darin enthaltene Biozid allmählich freigibt und so ein weiteres Wachstum der Mikroorganismen verhindert. Insgesamt behält damit die Beschichtungsmasse an der zu schützenden Oberfläche für einen längeren Zeitraum ein einwandfreies Aussehen. Ohne die Erfindung könnte eine silicatgebundene Beschichtungsmasse, die naturgemäß einen relativ hohen pH-Wert aufweist , nicht von Anfang an mit einem auf normale Weise eingemischten Biozid ausgerüstet werden, weil dieses in der stark alkalischen Umgebung zersetzt würde. Ferner würde eine solche Beschichtungsmasse ohne die Erfindung auch in relativ kurzer Zeit durch Auswaschen der alkalischen Bestandteile ihre biozide Wirkung verlieren und einen Algen- oder Pilzbewuchs wieder zulassen.According to a first embodiment, the coating composition according to the invention has a pH of at least 11. This has the advantage that the coating composition, after being applied to the surface to be protected, initially prevents the growth of microorganisms, in particular algae and fungi, by means of its pH in the alkaline range. Another advantage is that if, over time, the action of carbon dioxide from the air as well as thaw and rainwater neutralizes the alkaline components of the coating material more and more and leaches them out of the coating material and the pH value that results from this the mass would again enable microorganism growth, the carrier material used according to the invention gradually releases the biocide contained therein and thus prevents further growth of the microorganisms. Overall, the coating composition on the surface to be protected retains a perfect appearance for a longer period. Without the invention, a silicate-bound coating material, which naturally has a relatively high pH value, could not be equipped with a biocide mixed in in the normal way from the beginning, because this would decompose in the strongly alkaline environment. Furthermore, without the invention, such a coating composition would lose its biocidal action even in a relatively short time by washing out the alkaline constituents and would permit algae or fungal growth again.
Gemäß einer zweiten Ausführungsform der Erfindung kann die Beschichtungsmasse auch einen pH-Wert von deutlich unterhalb 11,0 , beispielsweise einen pH-Wert von 8,5 , aufweisen. Sie ist dann für ein Aufbringen auf einen stark alkalischen Untergrund, z.B. auf Beton oder einen zementgebundenen Armierungsputz eines VollwärmeputzSystems, vorgesehen. In diesem Fall dringen allmählich aus dem Untergrundmaterial alkalische Verbindungen in die biozidhaltige Beschichtung ein und würden darin durch die Erhöhung des pH-Werts normalerweise ein ungeschütztes Biozid zersetzen. Das wäre zum Beispiel dann der Fall, wenn die Beschichtung auf den stark alkalischen Untergrund aufgebracht würde, bevor dessen pH-Wert durch Kohlendioxid aus der Luft auf einen Wert gesunken ist, bei dem das Biozid stabil bleibt. Beispielsweise müßte bei Isothiazo- linonen als bioziden Wirkstoffen der pH-Wert auf etwa 4 bis 9 absinken.According to a second embodiment of the invention, the coating composition can also have a pH of significantly below 11.0, for example a pH of 8.5. It is then intended for application to a strongly alkaline surface, e.g. on concrete or a cement-bound reinforcement plaster of a full-heat plaster system. In this Falling alkaline compounds gradually penetrate from the substrate material into the biocide-containing coating and would normally decompose an unprotected biocide therein by increasing the pH. This would be the case, for example, if the coating were applied to the strongly alkaline substrate before its pH value had dropped to a value at which the biocide remained stable due to carbon dioxide from the air. For example, in the case of isothiazolinones as biocidal active ingredients, the pH should drop to about 4 to 9.
Würde man in einem solchen Fall eines stark alkalischen Untergrunds das Biozid in üblicher Weise, d.h. ohne das erfindungsgemäß eingesetztes Trägermaterial aus Feststoffteilchen, der Beschichtung zusetzen, wie es z.B. bei bekannten kunstharzgebundenen Putzen und Anstrichfarben geschieht, würde man keine oder eine nur unzureichende biozide Wirkung erzielen. Der Grund liegt darin, daß die aus dem Untergrund in die Beschichtung eindringenden stark alkalischen Bestandteile das Biozid zersetzen und/oder in eine lösliche Form bringen. Die dabei entstehenden Stoffe wirken nicht mehr biozid und/oder werden schnell ausgewaschen. Da nur wenige Biozide mit hoher Beständigkeit im stark alkalischen Bereich bekannt sind und deshalb in diesem Bereich das Wirkungsspektrum gegenüber Mikroorganismen stark eingeschränkt ist, bringt die Erfindung diesbezüglich eine wesentliche Verbesserung.In such a case of a strongly alkaline substrate, would the biocide be used in the usual way, i.e. without adding the carrier material of solid particles used according to the invention to the coating, as is e.g. happens with known synthetic resin-bound plasters and paints, one would achieve no or an insufficient biocidal effect. The reason is that the strongly alkaline components penetrating into the coating from the substrate decompose the biocide and / or bring it into a soluble form. The resulting substances are no longer biocidal and / or are quickly washed out. Since only a few biocides with high resistance in the strongly alkaline range are known and therefore the spectrum of action against microorganisms is severely limited in this range, the invention brings about a significant improvement in this regard.
Die erfindungsgemäße Beschichtungsmasse ist vorzugsweise ein silicatgebundener oder mineralischer Putz mit einem pH-Wert von mindestens 11 oder ein kunstharzgebundener oder silicon- harzgebundener Putz mit einem pH-Wert von unter 11.The coating composition according to the invention is preferably a silicate-bound or mineral plaster with a pH of at least 11 or a synthetic resin-bound or silicone-resin-bound plaster with a pH of less than 11.
Ferner ist es bevorzugt, daß die Beschichtungsmasse eine silicatgebundene Anstrichfarbe mit einem pH-Wert von minde- stens 11 oder eine kunstharzgebundene oder siliconharz- gebundene Anstrichfarbe mit einem pH-Wert von unter 11 ist .It is further preferred that the coating composition is a silicate-bound paint with a pH of at least at least 11 or a synthetic resin-bonded or silicone resin-bonded paint with a pH of less than 11.
Entsprechend den in der Umgebung von Putzen und Anstrichfarben hauptsächlich auftretenden Mikroorganismen ist es erfindungsgemäß bevorzugt, daß das Biozid ein Fungizid, ein Algizid oder ein Gemisch aus beiden ist. Dabei können auch mehr als zwei Biozide gleichzeitig eingesetzt werden.According to the microorganisms that mainly occur in the vicinity of plasters and paints, it is preferred according to the invention that the biocide is a fungicide, an algicide or a mixture of both. It is also possible to use more than two biocides at the same time.
Im Rahmen der Erfindung bevorzugte Fungizide sind Isothia- zolinone, Carbamate, Pyrithione, Aldehyde, Ketone, Chinone, Amine, Amidine, Guanidine, Hydrazo- und Azoverbindungen, aromatische Carbonsäurenitrile, -ester, -amide und -imide, Benzimidazole, Chinoxaline, Imidazole, Triazole, Pyrimidine, Triazine, halogenierte und nitrierte Alkohole und Phenole, Perhalogenalkylmercaptanderivate, Phosphor- und Phosphonsäureester, Tetrahydro-1, 3 , 5-thiadiazinthione, Thio- und Isothiocyanate, Thiophene, Antibiotika und pflanzliche Wirkstoffe. Spezielle Beispiele für erfindungsgemäß gut geeignete Fungizide sind Methyl-lH-benzimidazol-2-ylcarbamatPreferred fungicides in the context of the invention are isothiazolinones, carbamates, pyrithiones, aldehydes, ketones, quinones, amines, amidines, guanidines, hydrazo and azo compounds, aromatic carboxylic acid nitriles, esters, amides and imides, benzimidazoles, quinoxalines, imidazoles, Triazoles, pyrimidines, triazines, halogenated and nitrated alcohols and phenols, perhalogenoalkyl mercaptan derivatives, phosphoric and phosphonic acid esters, tetrahydro-1, 3, 5-thiadiazinthione, thio and isothiocyanates, thiophenes, antibiotics and herbal active substances. Specific examples of fungicides which are particularly suitable according to the invention are methyl-1H-benzimidazol-2-ylcarbamate
(Carbendazim) , 2-Pyridinthiol-l-oxid-Zink (Zinkpyrithion) 2-n-Octylisothiazolin-3-on (OIT) , 4 , 5-Dichloroctylisothia- zolin-3-on (DCOIT) und 3-Iod-2-propinyl-N-butylcarbamat(Carbendazim), 2-pyridinthiol-l-oxide zinc (zinc pyrithione) 2-n-octylisothiazolin-3-one (OIT), 4, 5-dichloroctylisothiazolin-3-one (DCOIT) and 3-iodo-2- propynyl-N-butyl carbamate
(IPBC) .(IPBC).
Im Rahmen der Erfindung bevorzugte Algizide sind Triazine, N,N-Dimethylharnstoffe und Uracile. Spezielle Beispiele für erfindungsgemäß gut geeignete Algizide sind N2-t-Butyl-N4- ethyl-6-methylthio-l, 3, 5-triazin-2, 4-diyldiamin (Terbutryn) , 2-Chlor-4, 6-bis (isopropylamino) -s-triazin, 2-t-Butylamino-4- ethylamino-6-methoxy-s-triazin, 2-Methylthio-4-butylamino-6- cyclopropylamino-s-triazin, 4-Butylamino-2-chlor-6-ethyl- amino-s-triazin, 3- (4-Isopropylphenyl) -1, 1-dimethylharn- stoff, N' - (3,4-Dichlorphenyl) -N,N-dimethylharnstoff und 3-t- Butyl-5-chlor-6-methyluracil . Die Feststoffteilchen des Trägermaterials sind vorzugsweise Granulatteilchen mit Hohlräumen.Preferred algicides in the context of the invention are triazines, N, N-dimethylureas and uracils. Specific examples of algicides which are very suitable according to the invention are N 2 -t-butyl-N 4 -ethyl-6-methylthio-1,3,5-triazine-2,4-diyldiamine (terbutryn), 2-chloro-4,6-bis (isopropylamino) -s-triazine, 2-t-butylamino-4-ethylamino-6-methoxy-s-triazine, 2-methylthio-4-butylamino-6-cyclopropylamino-s-triazine, 4-butylamino-2-chloro 6-ethylamino-s-triazine, 3- (4-isopropylphenyl) -1, 1-dimethylurea, N '- (3,4-dichlorophenyl) -N, N-dimethylurea and 3-t-butyl-5 -chloro-6-methyluracil. The solid particles of the carrier material are preferably granular particles with cavities.
Es ist vorteilhaft, wenn diese Granulatteilchen als Mikrokapseln ausgebildet sind. In diesen sind die Biozide in feindisperser, flüssiger oder fester Phase eingeschlossen. Als Wandmaterial der Mikrokapseln kommen sehr unterschiedliche Stoffe in Frage, nämlich natürliche, halbsynthetische und synthetische Materialien.It is advantageous if these granulate particles are designed as microcapsules. These contain the biocides in finely dispersed, liquid or solid phases. The wall material of the microcapsules can be very different materials, namely natural, semi-synthetic and synthetic materials.
Im Rahmen der Erfindung bevorzugte natürliche Materialien für die Mikrokapselwand sind Gummi arabicum, Agar, Agarose, Maltodextrin, Natriumalginat , Calciumalginat , Dextran, Fette, Fettsäuren, Cetylalkohol, Milchfeststoffe, Molassen, Gelatine, Gluten, Albumin, Schellack, Stärken, Caseinate, Stearine, Saccharose sowie Wachse, wie Bienenwachs, Carnau- bawachs und Spermacetiwachs .Natural materials preferred for the microcapsule wall in the context of the invention are gum arabic, agar, agarose, maltodextrin, sodium alginate, calcium alginate, dextran, fats, fatty acids, cetyl alcohol, milk solids, molasses, gelatin, gluten, albumin, shellac, starches, caseinates, stearins, Sucrose and waxes such as beeswax, carnau wax and spermaceti wax.
Bevorzugte halbsynthetische Materialien für die Mikrokapselwand sind Celluloseacetat , Celluloseacetatbutyrat , Cellulose- acetatphthalat , Cellulosenitrat , Ethylcellulose, Hydroxy- propylcellulose , Hydroxypropylmethylcellulose, Hydroxy- propylmethylcellulosephthalat , Methylcellulose, Natrium- carboxymethylcellulose, hydrierter Talg, Myristylalcohol, Glycerin mono- oder -dipalmitat, hydriertes Ricinusöl, Glycerylmono- oder -tristearate und 12-Hydroxystearylalkohol .Preferred semisynthetic materials for the microcapsule wall are cellulose acetate, cellulose acetate butyrate, cellulose acetate phthalate, cellulose nitrate, ethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl methyl cellulose phthalate, methyl cellulose, sodium carboxymethyl cellulose, hydrogenated tallow, hydrated tallow, hydrated tallow, myrylated, tallow, Glyceryl mono- or tristearates and 12-hydroxystearyl alcohol.
Bevorzugte synthetische Materialien für die Mikrokapselwand sind Formaldehyd-Melamin-Harze, Acrylpolymere und -copoly- mere, wie Polyacrylamid, Polyalkylcyanoacrylat , und Poly- (ethylenvinylacetat) , Aluminiummonostearat , Carboxyvinyl- polymere, Polyamide, Poly- (methylvinylether-maleinsäurean- hydrid) , Poly- (adipyl-L-lysin) , Polycarbonate , Polytere- phthalamid, Poly- (vinylacetatphthalat) , Poly- (terephthaloyl- L-lysin) , Polyarylsulfone, Poly- (methylmethacrylat) , Poly- (ε- caprolacton) , Polyvinylpyrrolidon, Polydimethylsi- loxan, Polyoxyethylene , Polyester, Polyglykolsäure, Poly- milchsäure und deren Copolymere, Polyglutaminsäure, Polyly- sin, Polystyrol, Poly- (styrol-acrylnitril) , Polyimide und Po- lyvinylalkohol .Preferred synthetic materials for the microcapsule wall are formaldehyde-melamine resins, acrylic polymers and copolymers, such as polyacrylamide, polyalkyl cyanoacrylate, and poly (ethylene vinyl acetate), aluminum monostearate, carboxyvinyl polymers, polyamides, poly (methyl vinyl ether-maleic anhydride), Poly (adipyl-L-lysine), polycarbonates, polyterephthalamide, poly (vinyl acetate phthalate), poly (terephthaloyl-L-lysine), polyarylsulfones, poly (methyl methacrylate), poly (ε-caprolactone), polyvinyl pyrrolidone, Polydimethylsi- loxane, polyoxyethylene, polyester, polyglycolic acid, polylactic acid and their copolymers, polyglutamic acid, polylysine, polystyrene, poly- (styrene-acrylonitrile), polyimides and polyvinyl alcohol.
Besonders bevorzugte Wandmaterialien der Mikrokapseln sind Formaldehyd-Melamin-Harze . Die Mikrokapselwand kann auch aus zwei oder mehr der vorgenanten Materialien bestehen.Particularly preferred wall materials of the microcapsules are formaldehyde-melamine resins. The microcapsule wall can also consist of two or more of the aforementioned materials.
Für die Herstellung der im Rahmen der Erfindung als Trägermaterial eingesetzten Mikrokapseln sind zahlreiche Verfahren bekannt (siehe beispielsweise C.A. Finch, R. Bodmeier, Micro- encapsulation, Ullmann's Encyclopedia of Industrial Chemistry, 6. Auflage 2001, Elektronic Release). In Abhängig keit von dem gewünschten Biozid und dem einzusetzenden Wandmaterial der Mikrokapseln kann jeweils das geeignete Verfahren ausgewählt werden.Numerous methods are known for producing the microcapsules used as carrier material in the context of the invention (see, for example, C.A. Finch, R. Bodmeier, Microencapsulation, Ullmann's Encyclopedia of Industrial Chemistry, 6th edition 2001, electronic release). Depending on the desired biocide and the wall material of the microcapsules to be used, the appropriate method can be selected in each case.
Es ist auch günstig, wenn als Granulatteilchen mit Hohlräumen solche Teilchen eingesetzt werden, deren Hohlräume z.B. durch Schäumen des Materials entstandene Poren sind, wie bei einem geschäumten keramischen Material oder bei Blähton, oder wenn die Hohlräume strukturbedingte Hohlräume sind, wie sie bei Zeolithen vorliegen.It is also expedient if such particles are used as granulate particles with cavities whose cavities e.g. pores created by foaming the material are, as in the case of a foamed ceramic material or in the case of expanded clay, or if the cavities are structure-related cavities, as are present in the case of zeolites.
Geeignete Granulatteilchen in Form eines geschäumten keramischen Materials und verschiedene Verfahren zu ihrer Herstellung sind z.B. aus der EP 0758633 Bl bekannt. Weitere Trägermaterialien, wie Zeolithe, sind in der DE 4337844 AI beschrieben.Suitable granulate particles in the form of a foamed ceramic material and various processes for their production are e.g. known from EP 0758633 Bl. Other support materials, such as zeolites, are described in DE 4337844 AI.
Die vorgenannten Feststoffteilchen des Trägermaterials, z.B. als Mikrokapseln, geschäumtes keramisches Material, Zeolith und ■ dergleichen, weisen vorzugsweise eine Größe im Bereich von 30 bis 40 μm auf. Außer den vorgenannten Bioziden sowie den Materialien für die Wand der Mikrokapseln oder für das poröse Granulat kann die erfindungsgemäße Beschichtungsmasse alle Stoffe enthalten, die in Abhängigkeit des Verwendungszwecks der Masse allgemein bekannt und üblich sind. Dazu gehören einerseits die entsprechenden Bindemittel und Filmbildner, wie Polyacrylate , Polystyrolacrylate oder Siliconharze, und andererseits die bekannten Hilfsstoffe, wie Pigmente, Füllstoffe, Lösemittel, Verdicker, Entschäumer, Weichmacher, Dispergiermittel, Emul- gatoren und Mittel zur Einstellung des pH-Werts der Beschichtungsmasse .The aforementioned solid particles of the carrier material, for example, like as microcapsules, foamed ceramic material, zeolite, and ■ preferably have a size in the range of 30 to 40 microns. In addition to the aforementioned biocides and the materials for the wall of the microcapsules or for the porous granules, the coating composition according to the invention can contain all substances which are generally known and customary, depending on the intended use of the composition. These include, on the one hand, the corresponding binders and film formers, such as polyacrylates, polystyrene acrylates or silicone resins, and, on the other hand, the known auxiliaries, such as pigments, fillers, solvents, thickeners, defoamers, plasticizers, dispersants, emulsifiers and agents for adjusting the pH of the coating composition ,
Die Beispiele erläutern die Erfindung.The examples illustrate the invention.
Die Herstellungsbeispiele 1 bis 3 erläutern die Herstellung von Mikrokapseln, in denen ein biozider Wirkstoff eingeschlossen ist .Production examples 1 to 3 illustrate the production of microcapsules in which a biocidal active ingredient is included.
Das Herstellungsbeispiel 4 erläutert die Herstellung eines silicatgebundenen Fassadenputzes, das Herstellungsbeispiel 5 jene eines kunstharzgebundenen Reibeputzes.Production example 4 explains the production of a silicate-bound facade plaster, production example 5 that of a synthetic resin-bound rubbing plaster.
Die Beispiele 1 bis 4 und die Vergleichsbeispiele 1 bis 4 erläutern die bessere Stabilität der erfindungsgemäßen Putze gegen Auswaschen des darin enthaltenen Biozids.Examples 1 to 4 and comparative examples 1 to 4 illustrate the better stability of the plasters according to the invention against washing out of the biocide contained therein.
Die Beispiele 5 und 6 sowie die Vergleichsbeispiele 5 bis 7 erläutern das Pilzwachstum auf verschiedenen Putzoberflächen und den durch die Erfindung erzielten Vorteil. Herstellungsbeispiel 1Examples 5 and 6 and comparative examples 5 to 7 illustrate the fungal growth on various plaster surfaces and the advantage achieved by the invention. Production Example 1
Unter Einsatz der nachfolgend angegebenen Stoffe wurden Mikrokapseln hergestellt, in denen Zinkpyrithion (2-Pyridin- thiol-1-oxid-Zink) als biozider Wirkstoff eingeschlossen war.Using the substances specified below, microcapsules were produced in which zinc pyrithione (2-pyridine thiol-1-oxide zinc) was included as a biocidal active ingredient.
Eingesetzte Stoffe Mengen, gSubstances used, g
Wasser 389,6 PolyacrylatWater 389.6 polyacrylate
(Coatex BR 3, Firma Dimed) 1,5(Coatex BR 3, Dimed) 1.5
Gummi arabicum 0 , 6 SiliconentschäumerGum arabic 0, 6 silicone defoamer
(Aspumit AP, Thor GmbH) 0,3(Aspumit AP, Thor GmbH) 0.3
Zinkpyrithion-Pulver 60,0Zinc pyrithione powder 60.0
Konzentrierte Salzsäure 4,0 Formaldehyd-Melamin-HarzConcentrated hydrochloric acid 4.0 formaldehyde melamine resin
(Quecodur DMQ, Thor GmbH) 144, 0(Quecodur DMQ, Thor GmbH) 144, 0
600, 0600, 0
Zur Herstellung der Mikrokapseln wurde das Wasser vorgelegt. Darin wurden Polyacrylat, Gummi arabicum, Siliconentschäumer und das Zinkpyrithion eingerührt . Das erhaltene Gemisch wurde mit Salzsäure auf einen pH-Wert von 3 eingestellt und dann auf eine Temperatur von 70 °C erwärmt. Anschließend wurde während 1 h das Formaldehyd-Melamin-Harz zugetropft . Nachfolgend wurde das Gemisch noch 2 h bei der gleichen Temperatur nachgerührt .The water was introduced to prepare the microcapsules. Polyacrylate, gum arabic, silicone defoamer and zinc pyrithione were stirred in. The resulting mixture was adjusted to pH 3 with hydrochloric acid and then heated to a temperature of 70 ° C. The formaldehyde-melamine resin was then added dropwise over a period of 1 hour. The mixture was subsequently stirred at the same temperature for a further 2 h.
Das erhaltene Gemisch enthielt die gewünschten Mikrokapseln und wurde unverändert bei der Herstellung des mikrokapselhal- tigen Putzes eingesetzt. Herstellungsbeispiel 2The mixture obtained contained the desired microcapsules and was used unchanged in the preparation of the microcapsule-containing plaster. Production Example 2
Unter Einsatz der nachfolgenden Stoffe wurden Mikrokapseln hergestellt, in denen DCOIT (4 , 5-Dichlor-2-octylisothiazolin- 3-on) als biozider Wirkstoff eingeschlossen war.Using the following substances, microcapsules were produced in which DCOIT (4, 5-dichloro-2-octylisothiazolin-3-one) was included as a biocidal active ingredient.
Eingesetzte Stoffe Menge , qSubstances used q
Wasser 389,6Water 389.6
Polyacrylatpolyacrylate
(Coatex BR 3, Firma Dimed) , 5 Gummi arabicum o , 6 Siliconentschäumer(Coatex BR 3, Dimed), 5 gum arabic o, 6 silicone defoamers
(Aspumit AP, Thor GmbH) o , 3 DCOIT, 98-%ig 60 , , 0 Konzentrierte Salzsäure 4 , , 0 Formaldehyd-Melamin-Harz(Aspumit AP, Thor GmbH) 0, 3 DCOIT, 98% 60,, 0 concentrated hydrochloric acid 4,, 0 formaldehyde-melamine resin
(Quecodur DMQ, Thor GmbH) 144 , , 0(Quecodur DMQ, Thor GmbH) 144,, 0
600 , , 0600, 0
Zur Herstellung der Mikrokapseln wurde das Wasser vorgelegt. Darin wurden Polyacrylat, Gummi arabicum, Siliconentschäumer und das Zinkpyrithion eingerührt . Das erhaltene Gemisch wurde mit Salzsäure auf einen pH-Wert von 3 eingestellt und dann auf eine Temperatur von 70 °C erwärmt. Anschließend wurde während 1 h das Formaldehyd-Melamin-Harz zugetropft . Nachfolgend wurde das Gemisch noch 2 h bei der gleichen Temperatur nachgerührt .The water was introduced to prepare the microcapsules. Polyacrylate, gum arabic, silicone defoamer and zinc pyrithione were stirred in. The resulting mixture was adjusted to pH 3 with hydrochloric acid and then heated to a temperature of 70 ° C. The formaldehyde-melamine resin was then added dropwise over a period of 1 hour. The mixture was subsequently stirred at the same temperature for a further 2 h.
Das erhaltene Gemisch enthielt die gewünschten Mikrokapseln und wurde unverändert bei der Herstellung des mikrokapsel- haltigen Putzes eingesetzt. Herstellungsbeispiel 3The mixture obtained contained the desired microcapsules and was used unchanged in the preparation of the microcapsule-containing plaster. Production Example 3
Unter Einsatz der nachfolgenden Stoffe wurden Mikrokapseln hergestellt, in denen IPBC (3-Iod-2-propinyl-N-butylcarbamat) als biozider Wirkstoff eingeschlossen war.Using the following substances, microcapsules were produced in which IPBC (3-iodo-2-propynyl-N-butyl carbamate) was included as a biocidal active ingredient.
Eingesetzte Stoffe Mengen, gSubstances used, g
Wasser 338,4Water 338.4
Gummi arabicum 0 , 6Gum arabic 0, 6
Siliconentschäumersilicone defoamers
(Aspumit AP, Thor GmbH) 3,0(Aspumit AP, Thor GmbH) 3.0
IPBC, 50-%ige wässrige DispersionIPBC, 50% aqueous dispersion
(Acticide IPW 50, Thor GmbH) 132 , 0 Citronensäure, 12-%ig 60 , . 0 Formaldehyd-Melamin-Harz(Acticide IPW 50, Thor GmbH) 132, 0 citric acid, 12% 60,. 0 formaldehyde-melamine resin
(Quecodur DMQ, Thor GmbH) 66 , , 0(Quecodur DMQ, Thor GmbH) 66,. 0
600,0600.0
Zur Herstellung der Mikrokapseln wurde das Wasser vorgelegt. Darin wurden Gummi arabicum, Siliconentschäumer und IPBC-Dis- persion eingerührt. Anschließend wurde das Gemisch mit der Citronensäure auf einen pH-Wert von 1 bis 2 eingestellt und auf eine Temperatur von 55 bis 60 °C erwärmt. Dann wurde während 1 h das Formaldehyd-Melamin-Harz zugetropft . Nachfolgend wurde 2 h bei 55 bis 60 °C nachgerührt.The water was introduced to prepare the microcapsules. Gum arabic, silicone defoamer and IPBC dispersion were mixed in. The mixture was then adjusted to a pH of 1 to 2 with the citric acid and heated to a temperature of 55 to 60 ° C. Then the formaldehyde-melamine resin was added dropwise over 1 hour. The mixture was subsequently stirred at 55 to 60 ° C for 2 h.
Das erhaltene Gemisch enthielt die gewünschten Mikrokapseln und wurde unverändert bei der Herstellung des mikrokapsel- haltigen Putzes eingesetzt. Herstellungsbeispiel 4The mixture obtained contained the desired microcapsules and was used unchanged in the preparation of the microcapsule-containing plaster. Production Example 4
Es wurde ein silicatgebundener weißer Fassadenputz mit einer Körnung von 1,5 bis 2 mm hergestellt. Zunächst wurde eine Vormischung vorbereitet, die dann zu einer Endmischung, d.h. dem Putz, weiterverarbeitet wurde.A silicate-bound white facade plaster with a grain size of 1.5 to 2 mm was produced. A premix was first prepared, which then became a final mix, i.e. the plaster was processed.
a) Vormischunga) Premix
Die folgenden Stoffe werden während 15 min gemischt, um ein Aufschließen bzw. Lösen zu erreichen.The following substances are mixed for 15 minutes to achieve disintegration or dissolution.
Gew.-%Wt .-%
Wasser 9,3Water 9.3
Dispergiermittel (Sapetin D 20) 0,1Dispersant (Sapetin D 20) 0.1
Silicatstabilisator (Betolin Quart 20) 0,3Silicate stabilizer (Betolin Quart 20) 0.3
Rheologisches Additiv (Rhodopol 50 MD) 0,1Rheological additive (Rhodopol 50 MD) 0.1
Titandioxid (Bayertitan R-KB-5) 3,0Titanium dioxide (Bayertitan R-KB-5) 3.0
Entschäumer (TEGO-Foamex KS 10) 0,2Defoamer (TEGO-Foamex KS 10) 0.2
Zu dem erhaltenen Gemisch werden die folgenden Stoffe unter Rühren zugegeben:The following substances are added to the resulting mixture with stirring:
Gew . -%Weight -%
Styrol-Acrylat-Copolymerdispersion,Styrene-acrylate copolymer dispersion,
50 gew.-%ig (Mowilith SDM 765 A) 6,0 Al-Mg-Silicat, D 50 300 μm50% by weight (Mowilith SDM 765 A) 6.0 Al-Mg silicate, D 50 300 μm
(Plastorit 05) 2,5 Armierender Faserfüllstoff(Plastorit 05) 2.5 Reinforcing fiber filler
(Arbocel B 400) 0,5(Arbocel B 400) 0.5
Calciumcarbonat, D 50 5 μm 4,0Calcium carbonate, D 50 5 µm 4.0
(Omyacarb 5-GU)(Omyacarb 5-GU)
Calciumcarbonat, D 50 7 μm 5,0Calcium carbonate, D 50 7 µm 5.0
(Omyacarb 10-GU) Calciumcarbonat, D 50 23 μm(Omyacarb 10-GU) calcium carbonate, D 50 23 µm
(Omyacarb 40-GU) 10,0 Dem erhaltenen Gemisch wurden unter Rühren nacheinander die folgenden Stoffe zugefügt :(Omyacarb 40-GU) 10.0 The following substances were successively added to the resulting mixture with stirring:
Gew.Wt.
Hydrophobierungsmittel 0 , 5Water repellents 0.5
(TEGO Phobe 1040 ) Additiv gegen Oberf lächenrißbildung 0 , 5(TEGO Phobe 1040) Additive against surface cracking 0, 5
(Lubranil A 1520 ) Stabilisiertes Kaliumsilicat(Lubranil A 1520) Stabilized potassium silicate
(Wasserglas , Betolin P 35 , 29 gew . -%ig)(Water glass, Betolin P 35, 29% by weight)
10 , 010, 0
b) Endmischungb) final mixture
Die oben unter a) angegebene Vormischung ließ man 3 Tage reifen. Dann wurden unter langsamem Rühren die folgenden Stoffe eingemischt:The premix indicated above under a) was allowed to ripen for 3 days. The following substances were then mixed in with slow stirring:
Gew.Wt.
Calciumcarbonat, D 50 160 μmCalcium carbonate, D 50 160 μm
(Omyacarb 130-GU) 11,0(Omyacarb 130-GU) 11.0
Calciumcarbonat-Körnung, D 50 1200 μmCalcium carbonate grit, D 50 1200 μm
(Austro-tec 10/15) 37,0(Austro-tec 10/15) 37.0
Die Gesamtmenge der oben angegebenen Stoffmengen für die Vormischung und die Endmischung ergibt 100,0 Gew.-%.The total amount of the amounts of substance given above for the premix and the final mixture gives 100.0% by weight.
Die fertige Endmischung war der Fassadenputz . In diesen wurden dann jeweils die Biozide gemäß den nachfolgenden Beispielen eingemischt . Herstellungsbeispiel 5The finished mix was the facade plaster. The biocides according to the examples below were then mixed into these. Production Example 5
Es wurde ein kunstharzgebundener weißer Reibeputz aus den nachfolgenden Stoffen in üblicher Weise hergestellt .A synthetic resin-bonded white rubbing plaster was made from the following materials in the usual way.
Gew. -% Polyacrylsäureester% By weight polyacrylic acid ester
(Acronal 290 D, BASF AG) 13 ,2 Natriumnpolyphosphat ,(Acronal 290 D, BASF AG) 13, 2 sodium polyphosphate,
25-%ige Lösung 0, 8 Konservierungsmittel25% solution 0, 8 preservative
(Acticide MBS, Thor GmbH) 0, 3 Entschäumer(Acticide MBS, Thor GmbH) 0, 3 defoamers
(Agitan 280) 0, .3 Verdicküngsmittel, Polyacrylat,(Agitan 280) 0, .3 thickener, polyacrylate,
8%-ige ammoniakalische8% ammoniacal
Lösung (Latekoll D, BASF AG) 0,8Solution (Latekoll D, BASF AG) 0.8
Testbenzinwhite spirit
(180-210 °C) 1, 0 Butyldiglykol 1, 0 Basophob WDS (BASF AG) o, 6 Titandioxid, Rutil(180-210 ° C) 1.0 butyl diglycol 1.0 Basophob WDS (BASF AG) 0.2 titanium dioxide, rutile
(Kronos 2044, Kronos Titan GmbH) 2, 8 Calciumcarbonat(Kronos 2044, Kronos Titan GmbH) 2, 8 calcium carbonate
(Omyacarb 40-GU) 39 ,5 Calciumcarbonat(Omyacarb 40-GU) 39.5 calcium carbonate
(Omyacarb 130-GU) 25 ,5 Al-Mg-Silicat(Omyacarb 130-GU) 25.5 Al-Mg silicate
(Plastorit 05) 6, ,5 Quarz-Rundkies 4, ,5 Wasser 3, ,2(Plastorit 05) 6,, 5 round quartz gravel 4,, 5 water 3,, 2
100,0100.0
Der erhaltene Reibeputz hatte einen pH-Wert von 8,5 bis 9. Beispiel 1 und Vergleichsbeispiel 1The rubbing plaster obtained had a pH of 8.5 to 9. Example 1 and Comparative Example 1
Der gemäß dem Herstellungsbeispiel 5 erhaltene kunstharzgebundene Putz mit einem pH-Wert von 8,5 wurde mit dem mikro- kapselhaltigen Gemisch gemäß dem Herstellungsbeispiel 1 versetzt. Die Biozidmenge in dem Putz betrug 578 ppm.The resin-bound plaster obtained according to Production Example 5 with a pH of 8.5 was mixed with the microcapsule-containing mixture according to Production Example 1. The amount of biocide in the plaster was 578 ppm.
Aus dem derart biozid ausgerüsteten Putz wurden Prüfkörper in Form von Putz-Rundproben für die Wässerungsprüfungen . hergestellt . Dazu wurde der Putz in eine runde Kunststoffform mit einem Durchmesser von ca. 5 cm und einer Tiefe von 3 mm eingestrichen. Die Schichtdicke entsprach der Korngröße des Putzes. Anschließend ließ man die Putzprobe trocknen und vollständig aushärten. Dann wurde der Prüfkörper aus der Form entnommen und für die Wässerungsprüfung konditioniert .Test specimens in the form of round plaster samples for the watering tests were made from the plaster treated in this way. manufactured . For this purpose, the plaster was painted into a round plastic mold with a diameter of approx. 5 cm and a depth of 3 mm. The layer thickness corresponded to the grain size of the plaster. The plaster sample was then allowed to dry and harden completely. The test specimen was then removed from the mold and conditioned for the washing test.
Zum Vergleich wurden auch Putz-Rundproben hergestellt, die sich von den obigen Proben nur dadurch unterschieden, daß das Zinkpyrithion nicht in mikroverkapselter Form, sondern in normaler Pulverform in den Putz eingemischt worden war.For comparison, round plaster samples were also produced, which differed from the above samples only in that the zinc pyrithione was mixed into the plaster, not in microencapsulated form, but in normal powder form.
Bei jeder Probe wurde der Gehalt an Zinkpyrithion in dem Putz vor dem Wässern und nach einer Wässerung während verschiedener Zeiträume bestimmt .For each sample, the level of zinc pyrithione in the plaster was determined before washing and after washing for different periods.
Die Proben wurden in 1 1 DIBT-Lösung statisch gewässert, wobei alle 24 h die Lösung vollständig erneuert wurde mit Ausnahme des 7. Tags .The samples were statically soaked in 1 1 DIBT solution, the solution being completely renewed every 24 hours, with the exception of the 7th day.
Bei der DIBT-Lösung handelt es sich um eine vom Deutschen Institut für Bautechnik (DIBT) angegebene alkalische Lösung zur Wässerung von Proben. Die Lösung hat einen pH-Wert von 12,5 und besteht aus folgenden Stoffen:The DIBT solution is an alkaline solution specified by the German Institute for Building Technology (DIBT) for watering samples. The solution has a pH of 12.5 and consists of the following substances:
Natriumhydroxid 0,88 gSodium hydroxide 0.88 g
Kaliumhydroxid 3,45 gPotassium hydroxide 3.45 g
Calciumhydroxid 0,48 gCalcium hydroxide 0.48 g
Wasser Rest bis 1 1Water remaining to 1 1
Die Ergebnisse sind nachfolgend angegeben.The results are shown below.
Restbiozid im Putz (pH 8,5), ppmResidual biocide in the plaster (pH 8.5), ppm
Wässerung in DIBT-Lösung, Tage ohne 2 5 10Soak in DIBT solution, days without 2 5 10
Beispiel 1 578 478 259 187Example 1 578 478 259 187
Vergleichsbeispiel 1 560 21 4 0Comparative Example 1 560 21 4 0
Beispiel 2 und Vergleichsbeispiel 2Example 2 and Comparative Example 2
Beispiel 1 und Vergleichsbeispiel 1 wurden wiederholt, jedoch mit der Änderung, daß nun der silicatgebundene Reibeputz gemäß dem Herstellungsbeispiel 5 mit einem pH-Wert von 11,5 eingesetzt wurde und die Wässerung in Wasser während 1, 2 und 7 Tagen erfolgte.Example 1 and comparative example 1 were repeated, but with the change that now the silicate-bound rubbing plaster according to preparation example 5 with a pH of 11.5 was used and the washing in water took place for 1, 2 and 7 days.
Die Ergebnisse sind nachfolgend angegeben.The results are shown below.
Restbiozid im Putz (pH 11,5), ppm Wässerung in Wasser, Tage ohne 2 5 10 Beispiel 2 531 423 325 21Residual biocide in the plaster (pH 11.5), ppm watering in water, days without 2 5 10 Example 2 531 423 325 21
Vergleichsbeispiel 2 568 2 0 0 Beispiel 3 und Vergleichsbeispiel 3Comparative Example 2 568 2 0 0 Example 3 and Comparative Example 3
Beispiel 1 und Vergleichsbeispiel 1 wurden im wesentlichen wiederholt, jedoch mit einigen Änderungen. Diese bestanden darin, daß anstelle der gemäß dem Herstellungsbeispiel 1 erhaltenen Mikrokapseln mit Zinkpyrithion nun die gemäß dem Herstellungsbeispiel 2 erhaltenen Mikrokapseln mit DCOIT als biozidem Wirkstoff eingesetzt wurden und anstelle einer Wässerung die Proben 4 Wochen lang auf eine Temperatur von 54 °C erhitzt wurden. Es wurde der silikatgebundene Putz gemäß dem Herstelungsbeispiel 4 mit einem pH-Wert von 11,5 verwendet.Example 1 and Comparative Example 1 were essentially repeated, but with some changes. These consisted in that instead of the microcapsules with zinc pyrithione obtained in Preparation Example 1, the microcapsules obtained in Preparation Example 2 with DCOIT as the biocidal active ingredient were used, and the samples were heated to a temperature of 54 ° C. for 4 weeks instead of washing. The silicate-bound plaster according to production example 4 with a pH of 11.5 was used.
Die Ergebnisse sind nachfolgend angegeben.The results are shown below.
Restbiozid im Putz (pH 11,5) und Biozidabbau nach Wärmebehandlung bei 54 °CResidual biocide in the plaster (pH 11.5) and biocide degradation after heat treatment at 54 ° C
Wärmebehandlung, ppm Abbau, % ohne 4 Wochen Beispiel 3 508 474 6,7Heat treatment, ppm degradation,% without 4 weeks Example 3 508 474 6.7
Vergleichsbeispiel 3 521 382 26,7Comparative Example 3 521 382 26.7
Beispiel 4 und Vergleichsbeispiel 4Example 4 and Comparative Example 4
Beispiel 3 und Vergleichsbeispiel 3 wurden wiederholt, jedoch mit der Änderung, daß anstelle der Mikrokapseln gemäß dem Herstellungsbeispiel 2 mit DCOIT nun die Mikrokapseln gemäß der Herstellungsbeispiel 3 mit IPBC eingesetzt wurden.Example 3 and comparative example 3 were repeated, but with the change that instead of the microcapsules according to preparation example 2 with DCOIT, the microcapsules according to preparation example 3 with IPBC were now used.
Die Ergebnisse sind nachfolgend angegeben.The results are shown below.
Restbiozid im Putz (pH 11,5) und Biozidabbau nach Wärmebehandlung bei 54 °CResidual biocide in the plaster (pH 11.5) and biocide degradation after heat treatment at 54 ° C
Wärmebehandlung, ppm Abbau, % ohne 4 Wochen Beispiel 4 280 256 8,6Heat treatment, ppm degradation,% without 4 weeks Example 4 280 256 8.6
Vergleichsbeispiel 4 291 211 27,5 Beispiele 5 und 6 sowie Vergleichsbeispiele 5, 6 und 7Comparative Example 4 291 211 27.5 Examples 5 and 6 and Comparative Examples 5, 6 and 7
Es wurde das Pilzwachstum auf der Probenoberfläche untersucht .The fungal growth on the sample surface was examined.
Der auf eine Trägerplatte aufgebrachte silikatgebundene Putz gemäß dem Herstellungsbeispiel 4 war entweder biozidfrei (Vergleichsbeispiel 5) , oder mit 100 ppm Zinkpyrithion (Vergleichsbeispiel 6) , 200 ppm Zinkpyrithion (Vergleichsbeispiel 7) , 100 ppm mikroverkapseltem Zinkpyrithion (Beispiel 5) oder 200 ppm mikroverkapseltem Zinkpyrithion (Beispiel 6) versetzt .The silicate-bound plaster applied to a carrier plate according to Preparation Example 4 was either biocide-free (Comparative Example 5), or with 100 ppm zinc pyrithione (Comparative Example 6), 200 ppm zinc pyrithione (Comparative Example 7), 100 ppm microencapsulated zinc pyrithione (Example 5) or 200 ppm microencapsulated zinc pyrithione (Example 6) added.
Die Putzproben wurden auf vorher gewässerte Calciumsilicat- platten der Größe 4 , 5 cm x 9 cm als Schicht aufgebracht . Die Schichtdicke des Putzes lag in der Größenordnung seiner Körnung, d.h. bei 1,5 bis 2 mm.The plaster samples were applied as a layer to previously watered calcium silicate plates measuring 4.5 cm × 9 cm. The layer thickness of the plaster was in the order of its grain, i.e. at 1.5 to 2 mm.
Nach dem Aushärten wurden die Proben gemäß Beispiel 1 gewässert .After curing, the samples were washed in accordance with Example 1.
Die Prüfung des Pilzwachstums geschah wie folgt:The mushroom growth test was carried out as follows:
Die Putzproben wurden in ein übliches Agarnährmedium eingegossen. Anschließend wurden die Proben mit einer Pilzsporensuspension besprüht. Die Suspension enthielt gleiche Anteile folgender Testorganismen:The plaster samples were poured into a common agar medium. The samples were then sprayed with a fungal spore suspension. The suspension contained equal proportions of the following test organisms:
Alternaria alternata Aspergillus niger Cladosporiu cladosporoides Penicillium funiculosum Ulocladium atrumAlternaria alternata Aspergillus niger Cladosporiu cladosporoides Penicillium funiculosum Ulocladium atrum
Die Gesamtkonzentration des Pilzinoculums betrug 106 Sporen/ml . Die Proben wurden in üblicher Weise über einen längeren Zeitraum bei für Pilze optimalen Wachstumsbedingungen gelagert. Anschließend wurde das Pilzwachstum auf der Probenoberfläche ausgewertet .The total concentration of the pilzinoculum was 10 6 spores / ml. The samples were stored in the usual way over a longer period of time under optimal growth conditions for fungi. The fungal growth on the sample surface was then evaluated.
Zur Bewertung des Pilzwachstums auf der Probenoberfläche wurde der nachfolgende Maßstab angewandt .The following scale was used to evaluate the fungal growth on the sample surface.
Wachstumsrate PilzwachstumGrowth rate fungal growth
Kein Wachstum sichtbarNo growth visible
x Minimales Wachstum (bis 25% der Fläche bewachsen)x minimal growth (covered up to 25% of the area)
xx Leichtes Wachstum (bis 50% der Fläche bewachsen)xx Slight growth (covered up to 50% of the area)
xxx Mittelstarkes Wachstum (bis 75% der Fläche bewachsen)xxx Medium growth (overgrown up to 75% of the area)
xxxx Starkes Wachstum (bis 100% der Fläche bewachsen)xxxx strong growth (covered up to 100% of the area)
Die Ergebnisse der Prüfung des Pilzwachstums bei den untersuchten Proben sind nachfolgend angegeben.The results of the fungus growth test on the samples examined are given below.
Pilzwachstum auf der Oberfläche des Putzes (pH 11-12) ohne/mit ZinkpyrithionFungal growth on the surface of the plaster (pH 11-12) without / with zinc pyrithione
WässerungMoire
Zinkpyrithion,zinc pyrithione,
PPm ohne 2 Taqe 5 TaqePP m without 2 Taqe 5 Taqe
Vergleichsbeispiel 5 0 xxx xxxx XXXComparative Example 5 0 xxx xxxx XXX
Vergleichsbeispiel 6 100 x X xxxComparative Example 6 100 x X xxx
Vergleichsbeispiel 7 200 0 X XXComparative Example 7 200 0 X XX
Beispiel 5 • 100 (verkapse >lt) 0 0 0Example 5 • 100 (encapsulate> lt) 0 0 0
Beispiel 6 200 (verkapse .lt) 0 0 0 Example 6 200 (encapsulated .lt) 0 0 0

Claims

Patentansprüche claims
Beschichtungsmasse zum Schutz gegen Mikroorganismenbefall von Oberflächen, die der Einwirkung von Feuchtigkeit oder Wasser ausgesetzt sind, wobei die Beschichtungsmasse entweder selbst einen pH-Wert von mindestens 11,0 aufweist oder für das Beschichten eines Untergrundmaterials vorgesehen ist, dessen pH-Wert mindestens 11,0 beträgt«, dadurch gekennzeichnet, daß die Beschichtungsmasse ein Biozid enthält, das in einem Trägermaterial aus Feststoffteilchen gebunden ist und daraus verzögert freigegeben wird.Coating composition for protection against microorganism attack on surfaces which are exposed to the effects of moisture or water, the coating composition itself either having a pH of at least 11.0 or intended for coating a substrate material whose pH is at least 11.0 is «, characterized in that the coating composition contains a biocide which is bound in a carrier material made of solid particles and is released therefrom with a delay.
2. Beschichtungsmasse nach Anspruch 1, dadurch- gekennzeichnet, daß sie ein silicatgebundener oder mineralischer Putz mit einem pH-Wert von mindestens 11 ist.2. Coating composition according to claim 1, characterized in that it is a silicate-bound or mineral plaster with a pH of at least 11.
3. Beschichtungsmasse nach Anspruch 1, dadurch gekennzeichnet, daß sie ein kunstharzgebundener oder siliconharz- gebundener Putz mit einem pH-Wert von unter 11 ist.3. Coating composition according to claim 1, characterized in that it is a synthetic resin-bound or silicone resin-bound plaster with a pH of less than 11.
4. Beschichtungsmasse nach Anspruch 1, dadurch gekennzeichnet, daß sie eine silicatgebundene Anstrichfarbe mit einem pH-Wert von mindestens 11 ist.4. Coating composition according to claim 1, characterized in that it is a silicate-bound paint with a pH of at least 11.
5'. 'Beschichtungsmasse nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Kunstharzgebundene oder Silicon- harzgebundene Anstrichfarbe mit einem pH-Wert von unter 11 ist.5 ' . Coating composition according to claim 1, characterized in that it is a synthetic resin-bonded or silicone-resin-bonded paint with a pH of less than 11.
6. Beschichtungsmasse nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Biozid ein Fungizid, ein Algizid oder ein Gemisch aus beiden ist.6. Coating composition according to one of the preceding claims, characterized in that the biocide is a fungicide, an algicide or a mixture of both.
P:\TEXT PATENTVt634SAN.DOC P: \ TEXT PATENTVt634SAN.DOC
. Beschichtungsmasse nach Anspruch 6, dadurch gekennzeichnet, daß das Biozid Zinkpyrithion, 4 , 5-Dichlor-2-octyl- isothiazolin-3-on, 3-Iod-2-propinyl-N-butylcarbamat , 2-n- Octylisothiazolin-3-on, Methyl-lH-benzimidazol-2-yl- carbamat oder N2-t-Butyl-N4-ethyl-6-methylthio-l, 3 , 5- triazin-2,4-diyldiamin oder ein Gemisch aus zwei oder mehr dieser Verbindungen ist ., Coating composition according to claim 6, characterized in that the biocide zinc pyrithione, 4, 5-dichloro-2-octyl-isothiazolin-3-one, 3-iodo-2-propynyl-N-butylcarbamate, 2-n-octylisothiazolin-3-one methyl-lH-benzimidazol-2-yl- carbamate or N 2 -t-butyl-N4-e thyl-6-methylthio-l, 3, 5- triazine-2,4-diyldiamine, or a mixture of two or more of these Connections is.
8. .Beschichtungsmasse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Feststoffteilchen des Trägermaterials Granulatteilchen mit Hohlräumen sind.8.. Coating composition according to one of claims 1 to 7, characterized in that the solid particles of the carrier material are granular particles with cavities.
9. Beschichtungsmasse nach Anspruch 8, dadurch gekennzeichnet, daß die Granulatteilchen mit Hohlräumen Mikrokapseln sind.9. Coating composition according to claim 8, characterized in that the granulate particles are microcapsules with cavities.
10. Beschichtungsmasse nach Anspruch 9, dadurch gekennzeichnet, daß das Wandmaterial der Mikrokapseln hauptsächlich aus einem Formaldehyd-Melamin-Harz besteht .10. Coating composition according to claim 9, characterized in that the wall material of the microcapsules consists mainly of a formaldehyde-melamine resin.
11. Beschichtungsmasse nach Anspruch 8, dadurch gekennzeich-: net , daß die Granulatteilchen mit Hohlräumen aus einem geschäumten- keramischen Material oder einem Zeolith bestehen.11. Coating composition according to claim 8, characterized in that the granulate particles with cavities consist of a foamed ceramic material or a zeolite.
12. Verwendung der Beschichtungsmasse nach einem der Ansprü- * ehe 1 bis 11 zum Beschichten von Gebäudewänden. 12. Use of the coating composition according to one of claims 1 to 11 for coating building walls.
EP02762295.0A 2002-06-19 2002-06-19 Coating material with biocide microcapsules Expired - Lifetime EP1519995B1 (en)

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EP1519995B1 (en) 2016-02-24
AU2002328296A1 (en) 2004-01-06
EP1698672B1 (en) 2019-08-07
EP1698672A2 (en) 2006-09-06
US20040234603A1 (en) 2004-11-25
ES2747255T3 (en) 2020-03-10
CN1578815A (en) 2005-02-09
US7429392B2 (en) 2008-09-30
US20080305137A1 (en) 2008-12-11
CN100344710C (en) 2007-10-24
ES2572162T3 (en) 2016-05-30
WO2004000953A1 (en) 2003-12-31
EP1698672A3 (en) 2006-09-20

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